Study on Controlling Power Quality Based on Thermodynamics Modeling Method for 6.3kV Power System - Intelligent Computing for Sustainable Energy and Environment - page 8

Fig. 6. The harmonic current by FC and TSC Fig.7. The harmonic current by FC, TSC and PPF

Table 5. Harmonic current of 6.3KV bus by fc, tsc and ppf A

harmonic current

harmonic order 5 7 11 13

allowed value 63.04 44.50 29.66 29.66

average values 111.60 11.40 10.80 7.00

FC+TSC 40.20 23.10 10.30 7.50

FC+TSC+ PPF 12.60 10.10 2.40 4.00

Fig.8. Power factor by FC and TSC Fig.9. Power factor by FC, TSC and PPF

Figure8 and Figure9 show that though the maximum power factors reached 0.96
there still were some surges of reactive power by the action of FC and TSC only.
Figure 13 indicates that the negative effect can be eliminated by the PPF.

5 Conclusions

This paper aims at promoting development of the smart grid by controlling the power
quality of the power system. For this purpose, a thermodynamics modeling method
was used to analyze the stability and performance of typical filter and reactive power